Example playground to show off the visualzations you can get with Swift playgrounds.

education.swift

// Playground - noun: a place where people can play

import UIKit
import QuartzCore

var str = "Hello, playground"

var nums = [1, 3, 5, 7, 9, 11, 13]

var count = 1
for num in nums {
    count *= num
}

var view = UIView(frame: CGRectMake(0, 0, 100, 100))
view.layer.cornerRadius = 10.0
view.layer.borderColor = UIColor.blueColor().CGColor
view.layer.borderWidth = 10.0


var miniView = UIView(frame: CGRectMake(30, 30, 40, 40))
miniView.backgroundColor = UIColor.greenColor()
view.addSubview(miniView)

view.backgroundColor = UIColor.yellowColor()